Bite 372. Validate Pangram

A pangram, according to the Oxford English Dictionary, is a sentence or verse that contains all of the letters of the alphabet.

Given a string containing only English letters, write a function that returns True if sentence is a pangram or False otherwise.

Make sure to remove any whitespace and lowercase the string.

Example:

>>> from  pangram import validate_pangram
>>> sentence = "The quick brown fox jumps over a lazy dog"
>>> validate_pangram(sentence)
True

Example 2:

>>> from  pangram import validate_pangram
>>> sentence = "PYBITES IS A COMMUNITY OF PYTHON CODERS"
>>> validate_pangram(sentence)
False

Keep calm and code in Python!